Simple Machines

There are six types of simple machines, which includes levers, inclined planes, the wheel and axle, the pulley, the wedge, and the screw. There are three types of levers which include 1st-3rd class.

1st Class Levers

Example: seesaw

Formula:

Ideal Mechanical Advantage= distance from input force to fulcrum/distance from output force to fulcrum

Or

IMA=din/dout

2nd Class lever

Example: wheelbarrow.

Formula: Ideal Mechanical Advantage= distance from input force to fulcrum/distance from output force to fulcrum

Or

IMA=din/dout

3rd Class Levers

Example: tweezers.

Formula: Ideal Mechanical Advantage= distance from input force to fulcrum/distance from output force to fulcrum

Or

IMA=din/dout

Inclined Plane

Example: Ramp.

Formula: Ideal Mechanical Advantage= length of incline/height of incline

IMA=l/h

Wheel and Axle

Example: Semi-truck wheels.

Formula: Ideal Mechanical Advantage=radius of input/radius of output

Or

IMA=Rin/Rout

Pulley

Example: stage curtain.

Wedge

Example: door stop

Screw

Example: bottle cap

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